Fundamental mobility trends in the Northern part of the Moravian-Silesian zone (the Bohemian Massif) – a complex geodynamic analysis
 

Grant No.:

205/01/0480

Grant Agency:

Czech Science Foundation (GAČR)

Resolved in:

2001 - 2003

Principal investigator:

V. Schenk, Laboratory of Geodynamics, IRSM AS CR, v.v.i. 1)

Co-investigators:

Z. Kaláb, Institute of Geonics of the ASCR, v. v. i., Ostrava 2)
R. Grygar, Faculty of Mining and Geology, VŠB - Technical University of Ostrav 3)
Co-operation:
RNDr. Karel Holub, Dr.Sc. 3),
Ing. Jan Jelínek, CSc. 3),
Ing. Jaromír Knejzlík, CSc. 2),
Ing. Pavel Kottnauer 1),
RNDr. Zdeňka Schenková, CSc. 1)

Description:

The project continuated the GA CR project No. 205/97/0679 activities under that a building of a geodynamic network for a monitoring of GPS satellite signals and local seismic events in the northern part of the Moravo-Silesian zone had been done to identify recent geodynamic movements among individual geological structural blocks. Thus, an aim of this project was
1) to continue in the GPS epoch measurements and seismic monitoring of the area,
2) to extend the geodynamic network to new sites,
3) to elaborate criteria for natural and induced seismic event recognition and to work out velocity model, and finally
4) to identify recent tectonic mobility sources linked to the latest Alpine geodynamics. GPS data were processed with the Bernese 4.2 software. Seven epoch measurements allowed annual movement trends to be detected and geodynamical terranes to be identified. RMS values calculated from all seven epochs showed that an uncertainty in the horizontal movement velocity determination did not exceed 1 milimetres and in the vertical movements 2-3 milimetres. Monitoring of regional seismic activity delineated several seismogenic zones. The seismic stations registered local and mining induced events up to ML = 0. Nine local earthquakes were recorded in 2001-2003 period. Geological structure-tectonic mapping of brittle deformations was correlated to data of the digital elevation model. Paleostress analyses of the Moravo-Silesian area displayed the NNW-SSE compression and ENE-WSW strike-slip regime. The Lusatian (WNW-ESE) and Sudetic (NW-SE) fault systems seemed to be in a pseudo-conjunction with the Moravo-Silesian (NNE-SSW) and Orlice (NNW-SSE) systems.

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Project in The Research and Development and Innovation System of the Czech Republic (in Czech only)
 
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